What is the biggest advantage with using a Layer 3 switch as an inter-VLAN router?
The following are advantages of using Layer 3 switches for inter-VLAN routing: They are much faster than router-on-a-stick because everything is hardware switched and routed.
Why are VLANs important and on what layer?
VLANs work at layer 2, or the data link layer of the OSI model.In simple networks, VLAN bridges can be created that group the ports on a switch into VLANs based on a mapping held within the bridge. The end devices are put in a VLAN depending on that mapping (see below for how this mapping might be carried out).
Does your router need to support VLAN?
Yes… but that won’t make it work. If the device (router) doesn’t support VLANs, that usually means it won’t understand any 802.1Q tagged packets, therefore its switch port must have one untagged VLAN (and the port’s PVID must match). However, you cannot put multiple untagged VLANs on the same port.
Can a multilayer switch replace a router?
All in all, it is not recommended to replace a router with layer 3 switch, but you can apply them in the same network at the same time.
Can a Layer 3 switch replace a router?
Although both Layer 3 switches and routers have routing functions, they cannot be equated. The router not only has routing functions, but also provides additional functions of switch ports and hardware firewalls. The purpose of the router is to make the device more applicable and more practical.
What are the disadvantages of inter-VLAN routing?
What is a disadvantage of using router-on-a-stick inter-VLAN…
- does not support VLAN-tagged packets.
- requires the use of more physical interfaces than legacy inter-VLAN routing.
- does not scale well beyond 50 VLANs.
- requires the use of multiple router interfaces configured to operate as access links.
What are the advantages of VLAN and inter VLAN routing?
VLANs provide the following advantages:
- VLANs enable logical grouping of end-stations that are physically dispersed on a network.
- VLANs reduce the need to have routers deployed on a network to contain broadcast traffic.
- Confinement of broadcast domains on a network significantly reduces traffic.
What are the disadvantages of VLAN?
Disadvantages of VLAN
- A packet can leak from one VLAN to other.
- An injected packet may lead to a cyber-attack.
- Threat in a single system may spread a virus through a whole logical network.
- You require an additional router to control the workload in large networks.
- You can face problems in interoperability.